Tool mounting for hammers



Nov. 2, 1943. o. o. APPTON TOOL MOUNTING FOR HAMMERS Original Filed May 19, 1958 ATTORNEY y Patented Nov. 2, 1943 TOOL MOUNTING FOR HAMlWERS Oliver O. Appton, New York, N. Y., assignor to Lorintha B. Appton, New York, N. Y.

Original application May 19, 1938, Serial No.

208,773, now Patent No. 2,265,989, dated December 16, 1941. Divided and this application December 15, 1941, Serial No. 423,031

3 Claims.

This invention relates to What are commonly termed hammers or implements of this kind operated by compressed air or other pressure fluids and more particularly to the tool mounting for implements of this class, and the object of the invention is to provide a tool supporting chuck having resiliently operated means for retaining the tool against accidental displacement While compensating for reciprocating movement imparted to the tool by the hammer element of the implement, a further object being to provide means adjustable on the chuck body adapted, in one position thereof, to positively retain the control valve of the implement in open position, and with these and other objects in View the invention consists in a tool supporting chuck of the kind dened constructed as more fully hereinafter described.

This invention is fully disclosed in the following specication, of which the accompanying drawing forms a part, in which the separate parts of my invention are designated by suitable reference characters in each of the views, and in which:

Fig. 1 is a longitudinal sectional view through an implement made according to my invention.

Fig. 2 is a plan view of one end portion of the implement.

Fig. 3 is a cross section on the line 3-3 of Fig. 1; and

Fig. 4 is a view similar to Fig. 1 showing only part of the construction and with parts in a. different position. l

The present application constitutes a division of my prior application, led under the name of Oliver O. App, Ser. No. 208,773, May 19, 1938, now Patent #2,265,989, issued December 16, 1941, since which time my name has been legally changed to the name used in this application.

To illustrate the general structure of the implement or hammer the following brief description is submitted:

In Fig. 1 of the drawing II) represents the cylinder, II the casing or sleeve tting on the cylinder and forming ports or passages longitudinally thereof which control the passage of air or other fluid pressure in the operation of the hammer. At I2 is shown the hollow cap on one end of the casing with which an air supply is adapted to be coupled in supplying air to the various ports or passages of the hammer. At I3 is shown a plug seating in one end of the cylinder and on the cap which controls the feed of air into the cylinder.

In the bore I4 of the cylinder is arranged a piston, plunger or hammer I5 having two cylindrical portions I6 and I1 controlling various ports I8, I9, 20 and 2I as well as intake ports 22 and exhaust ports 23'and 24. The ports 23 and 24 open into a long passage 25 'which communicates with exhaust passages 26 arranged at the end portion of the cylinder in which the tool 21 is supported. A chuck body 28 is employed to support the tool 21 in the implement, the inner end of this body is externally threaded as seen at 29 to engage a correspondingly threaded end of the cylinder IU, the vchuck body `having a flange 30 seating upon the end of the cylinder.r

A key pin 3l passes through the iiange and enters a recess in the end of the cylinder I0 to retain the chuck body against accidental displacement. The outer end portion of the chuck body has an elongated aperture 32 in whichA is slidably mounted a lock rod 33, the rod also operating in an aperture 34 in the body of the `chuck to sup-V port a control valve 35 in open position as later described. The body of the outer end portion of the chuck is provided with a Wide circumferential groove 36 in which is mounted a spring ring' or collar 31. One side of the splitv portion 38 of this ring has a notch or recess 39 adapted to receive an angularly extending handle portion 40 on the rod 33, to support the rod in the retracted position as seen in Fig. 1, whereas when the rod is in operative position as seen in Fig. 4, the end 40 engages the inner surface of the ring 31 to retain the same in operative position.

The tool 21 has a shank portion of angular cross sectional contour being Octagon in form in the construction shown, and this shank has an annular recess 4I extending longitudinally of the shank sufficiently to compensate for reciprocating movement of the tool. The chuck body, in alignment with the spring ring portion thereof, has opposed apertures 42 in which are arranged bearing balls 43, these balls being held in the groove 4I by the spring ring 31. These balls retain the tool 21 against accidental displacement from the chuck body, while at the same time providing quick attachment and detachment of the tool as will be apparent. The inner end portions of the apertures 42 have inturned flange portions 44 which check inward movement of the balls 43.

It will be understood that the end portion 45 of the plunger I5 is adapted to strike the tool in the operation of the tool, and the operation of the implement is controlled by the movement of the valve 35 and also through the medium of a baffle 46, adjustably supported on the tool end of ment the plunger Will be automatically reciprocated at high speed and controlled by the valve 35,',

lof

'and further regulated by adjustment of the baille 46 in controlling what might be termed heavy-or light duty performance of, theimplement; In

other uses of the implement itis desirabletoi maintain the valve 35 in open position in which event the finger piece end-40 of the rod-;33iis forced through the split 381ofjthe ring, 3.71 to-V bring the same into the position shown in 4 in which position the rod engages the valve to hold it in open position.

In the present 4application all `specific reference tothe variousI `sllllltture details of the implement have been dispensedjwith and, only such parts.

thereof have Vbeendescribed to identify the. general assen;blast,r the Structure of. the implement being coveredgenerallyin the original applica-l tionv and further: moregspe'cifically in another divisional application filed of equal date herewith in whichv the baille construction is morespecically defined;

Withfthefpresent construction ,applicant provides .atoollsllppOrtlng chuck which is of simple and economical construction and one which can readily be attached and detached with respect to thecylinder of the,implement for cleaning. re, pair. orotherzpurposes andat thesame` time a chuck is provided wherein a tool may be quickly i and easilycattached and detached to the chuck.

whilebeng retained, againstl accidental displace- :nent therefrom in a manner which compensates for `movement imparted to the tool inthe `operation of the implemente,

I Claim;

1.` In afluid pressure operated implement of the character described, an ,elongated Vcylinder,v ai001;Operatinapistnimevable longitudinally/ithe .Cylinders means attheiouter endvof. the ,cyl--l meer; for sietaehahlytcqupliagae001, therewan.- in alignment' Witnsa-id .pistoasaid ,means .corrxpris-y inlmefnsi ratalnlneithe $09.1; against a@c isiental.V displafieraentswhlepmviding reciproca-tina move@ ment of thehtoolzin v said;meansna Areciproeating r:

valveinfthecylinder controllinaonerationbsaid implement, and manually adjustable means at the outer end only of the cylinder and supported in said rst named means and cooperating with said valve to retain the valve in a predetermined position.

2. In a fluid pressure operated implement of the character described ameloniatedioyllndr, a tool supporting bodywat onefmd^`ioitlfle'-'oylinder, said body having an elongated bore of angular cross sectional form, a tool mounted in said body and having end ,portions corresponding in cross section to the bore of said body, the tool intermed iate1 said'end portions having a circumferential recess.- extending longitudinally thereof, bearing balls mounted in opposed walls of said body to engage theirecessed portion of said tool in retainingqtlie toolfagainstlaccidental displacement from said body; asprin-g ring on said body engaging said balls to support the same in operative position, a reciprocating valve in the cylinder controlling. n operation of said implement,V a; keyfrod slidably mounted in` Asaili-body l and. cooperaattiairr with said valve toretaintheyalve inalpvedetelfV mined .positiom and meansonsaid rod cooper-atingwithsaidf spring ringfto retain-,the rod-in. different positions ofV adjustment-in said, fbody.

3. In. 'a fluid. pressure-operated; implement of .tha character .describedf an.. elongated cylinder, t a mol supporting body at one rendi of the cylinder saidy body rhaving an elongated. bore A:of angulap crosslI sectional. form,4 a tool.;mo1.1nted-` in sai.d-.-bodyfand-4 havingr end ip ortionsf correspondingninz :cross-sec tion to the bore .of said body,. a,toolfinterniodiate1` said end` portions havngaafcircumferential rvrecess. extending longitudinally:` thereof, bearing:` balls mounted, in. opposed vwalls-fotsaid body. to engageg the recessedportion of said tool inmetaining ethe. tool against accidental displacementf-fromrsaid: body,x a spring ring;,on=,said fbodyfengagingsaid balls Atolsupport the samein operativelpositionfaa reciprocating' valve Y inthe-,cylinders continuing;s openation.4 of said implement-.said hodyfhavinsian': elongatedf passageopeningi outwardlyf tliuexcwthrough where said spring ring is located, a'keyx/ l rodyslidably 4mountedfin thepaagefo said body,

the :outer-endroit' saidfrodfhavinls-anromemul piece,I lsaid-.springrix'igghavinaxa snatch receiving the finger piece of said rod to support thmmddnzzi inoperative gposition; ,andxsaida nsor :Dk'tngaging one end of the spring ring in suppoztlng the rod fin.;operativefpnsiiziiin engaslnmsaiid valve to retain the valve inV aipredctemnedposttibnn OLIVER 

